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proc_creation_win_rundll32_by_ordinal.yml
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proc_creation_win_rundll32_by_ordinal.yml
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title: Suspicious Call by Ordinal
id: e79a9e79-eb72-4e78-a628-0e7e8f59e89c
status: stable
description: Detects suspicious calls of DLLs in rundll32.dll exports by ordinal
references:
- https://techtalk.pcmatic.com/2017/11/30/running-dll-files-malware-analysis/
- https://github.com/Neo23x0/DLLRunner
- https://twitter.com/cyb3rops/status/1186631731543236608
- https://www.welivesecurity.com/2022/03/01/isaacwiper-hermeticwizard-wiper-worm-targeting-ukraine/
author: Florian Roth (Nextron Systems)
date: 2019/10/22
modified: 2023/02/09
tags:
- attack.defense_evasion
- attack.t1218.011
logsource:
category: process_creation
product: windows
detection:
selection_img:
- Image|endswith: '\rundll32.exe'
- OriginalFileName: 'RUNDLL32.EXE'
selection_cli:
CommandLine|contains:
- ',#'
- ', #'
- '.dll #' # Sysmon removes , in its log
- '.ocx #' # HermeticWizard
filter_edge:
CommandLine|contains|all:
- 'EDGEHTML.dll'
- '#141'
filter_vsbuild_dll:
ParentImage|contains:
- '\Msbuild\Current\Bin\'
- '\VC\Tools\MSVC\'
- '\Tracker.exe'
CommandLine|contains:
- '\FileTracker32.dll,#1'
- '\FileTracker32.dll",#1'
- '\FileTracker64.dll,#1'
- '\FileTracker64.dll",#1'
condition: all of selection_* and not 1 of filter_*
falsepositives:
- False positives depend on scripts and administrative tools used in the monitored environment
- Windows control panel elements have been identified as source (mmc)
level: high